Biodegradation of microplastics: optimization and scale up
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Tipo de documento: | Dissertação |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10773/25362 |
Resumo: | Marine litter, specifically small plastic particles, is one of the major threats to the marine ecosystem. The presence of these microplastics has been increasing over the last few years due to their indiscriminate use and lack of polices for their management. Thereby, it is necessary to encounter new ways to mitigate their impacts or even reduce their presence. Biodegradations is a promising solution to this problem. In this work, with the objective of developing a bioremediation process the potential of Zalerion maritimum, to biodegrade polyethylene microplastics, is exploited. Through optimization of the biodegradation medium, by Central composite design and by Uniform design, was possible to obtain higher percentages of microplastics removal and verify that malt extract was the most relevant compost medium to the process. By scale up it was possible to verify that in a less controlled medium the biodegradation of microplastics still occur. In addition, the response of the fungi Zalerion maritimum and Nia vibrissa to exposure to poly(ethylene2,5-furandicarboxylate) has also been studied and it was possible to conclude that these fungi seems to have the capacity of biodegrade this micro(bio)plastic. |
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Biodegradation of microplastics: optimization and scale upZalerion maritimumNia vibrissaFungusBiodegradationMicroplasticsPolyethylenePoly(ethylene2,5-furandicarboxylate)BioplasticFTIR-ATRSEMMarine litter, specifically small plastic particles, is one of the major threats to the marine ecosystem. The presence of these microplastics has been increasing over the last few years due to their indiscriminate use and lack of polices for their management. Thereby, it is necessary to encounter new ways to mitigate their impacts or even reduce their presence. Biodegradations is a promising solution to this problem. In this work, with the objective of developing a bioremediation process the potential of Zalerion maritimum, to biodegrade polyethylene microplastics, is exploited. Through optimization of the biodegradation medium, by Central composite design and by Uniform design, was possible to obtain higher percentages of microplastics removal and verify that malt extract was the most relevant compost medium to the process. By scale up it was possible to verify that in a less controlled medium the biodegradation of microplastics still occur. In addition, the response of the fungi Zalerion maritimum and Nia vibrissa to exposure to poly(ethylene2,5-furandicarboxylate) has also been studied and it was possible to conclude that these fungi seems to have the capacity of biodegrade this micro(bio)plastic.O lixo marinho, em especial, os plásticos de pequenas dimensões, é uma das maiores ameaças ao ecossistema marinho. A presença destes microplásticos tem vindo a aumentar nos últimos tempos, devido ao uso indiscriminado de plástico pela população humana e à falta de políticas para a sua gestão. Assim, é necessário encontrar maneiras de mitigar os seus impactos ou mesmo reduzir a sua presença. A biodegradação surge como uma solução promissora para este problema. Neste trabalho, com o objetivo de desenvolver um processo de biorremediação, o potencial de biodegradação, de microplásticos de polietileno, do fungo Zalerion maritimum é explorado. Através da otimização do meio de cultura, por “Central composite design” e por “Uniform design”, foi possível obter maiores taxas de remoção de microplásticos e verificar que o extrato de malte é o constituinte do meio mais relevante neste processo. Pelo aumento da escala foi possível verificar que mesmo num ambiente menos controlado o fungo biodegrada microplásticos. Além disso, foi também testada a resposta do fungo Zalerion maritimum e do fungo Nia vibrissa, quando expostos ao poli(2,5- furanodicarboxilato de etileno) e foi possível verificar que ambos os fungos parecem ter a capacidade de biodegradar este micro(bio)plástico.2019-02-20T14:41:29Z2018-12-12T00:00:00Z2018-12-12info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10773/25362TID:202238288engPaço, Ana Maria Simões doinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-02-22T11:49:23Zoai:ria.ua.pt:10773/25362Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:58:42.109347Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Biodegradation of microplastics: optimization and scale up |
title |
Biodegradation of microplastics: optimization and scale up |
spellingShingle |
Biodegradation of microplastics: optimization and scale up Paço, Ana Maria Simões do Zalerion maritimum Nia vibrissa Fungus Biodegradation Microplastics Polyethylene Poly(ethylene2,5-furandicarboxylate) Bioplastic FTIR-ATR SEM |
title_short |
Biodegradation of microplastics: optimization and scale up |
title_full |
Biodegradation of microplastics: optimization and scale up |
title_fullStr |
Biodegradation of microplastics: optimization and scale up |
title_full_unstemmed |
Biodegradation of microplastics: optimization and scale up |
title_sort |
Biodegradation of microplastics: optimization and scale up |
author |
Paço, Ana Maria Simões do |
author_facet |
Paço, Ana Maria Simões do |
author_role |
author |
dc.contributor.author.fl_str_mv |
Paço, Ana Maria Simões do |
dc.subject.por.fl_str_mv |
Zalerion maritimum Nia vibrissa Fungus Biodegradation Microplastics Polyethylene Poly(ethylene2,5-furandicarboxylate) Bioplastic FTIR-ATR SEM |
topic |
Zalerion maritimum Nia vibrissa Fungus Biodegradation Microplastics Polyethylene Poly(ethylene2,5-furandicarboxylate) Bioplastic FTIR-ATR SEM |
description |
Marine litter, specifically small plastic particles, is one of the major threats to the marine ecosystem. The presence of these microplastics has been increasing over the last few years due to their indiscriminate use and lack of polices for their management. Thereby, it is necessary to encounter new ways to mitigate their impacts or even reduce their presence. Biodegradations is a promising solution to this problem. In this work, with the objective of developing a bioremediation process the potential of Zalerion maritimum, to biodegrade polyethylene microplastics, is exploited. Through optimization of the biodegradation medium, by Central composite design and by Uniform design, was possible to obtain higher percentages of microplastics removal and verify that malt extract was the most relevant compost medium to the process. By scale up it was possible to verify that in a less controlled medium the biodegradation of microplastics still occur. In addition, the response of the fungi Zalerion maritimum and Nia vibrissa to exposure to poly(ethylene2,5-furandicarboxylate) has also been studied and it was possible to conclude that these fungi seems to have the capacity of biodegrade this micro(bio)plastic. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-12-12T00:00:00Z 2018-12-12 2019-02-20T14:41:29Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10773/25362 TID:202238288 |
url |
http://hdl.handle.net/10773/25362 |
identifier_str_mv |
TID:202238288 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799137640932442112 |